The correct answer is b; they are independent because the occurrence of one does not affect the occurrence of the other.
First multiply (-5/6) and (1/6) to get
then you subtract that from (8/9) to get
final answer is
Remark
All vertical lines are of the form x = a. The y value only places where the point is on the grid.
For this particular question the x value of the point is where the vertical line is. At x = -2 draw a vertical line. The graph shows what this looks like.
The graph (x = - 2) is in red.
The point (-2,10) is green.
